Layer-by-layer slow-release water treatment agent for delaying seawater membrane fouling and preparation method thereof

A water treatment agent, seawater membrane technology, used in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc.

Active Publication Date: 2019-08-30
自然资源部天津海水淡化与综合利用研究所
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem to be solved by the present invention is to overcome the above-mentioned defects in the existing technology, and provide a layer-by-layer slow-release water treatment agent and its preparation method for delaying the seawater membrane fouling

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Layer-by-layer slow-release water treatment agent for delaying seawater membrane fouling and preparation method thereof
  • Layer-by-layer slow-release water treatment agent for delaying seawater membrane fouling and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] A layer-by-layer slow-release water treatment agent for delaying seawater membrane fouling, which is composed of an inner layer of adsorbent, a coating layer of a coagulant aid and an outer layer of a flocculant, the adsorbent of the inner layer is powdered activated carbon, and the coagulant aid of the coating layer is polyacrylamide , the outer flocculant is polyferric chloride. The particle size of the inner adsorbent powder activated carbon is 90 μm. The mass ratio of the inner layer adsorbent, the coating layer coagulant and the outer layer flocculant is 40:15:45. The layer-by-layer slow-release water treatment agent that delays seawater film pollution is spherical in shape and has a particle diameter of 1 mm.

[0099] Thus, the obtained layer-by-layer slow-release water treatment agent is added to seawater, and each component is released and dissolved sequentially in time sequence, which not only plays the role of flocculant in compressing the electric double lay...

Embodiment 2

[0101] A layer-by-layer slow-release water treatment agent for delaying seawater membrane fouling. Methyl diallyl ammonium chloride, the outer flocculant is polyaluminum chloride. The particle size of the inner adsorbent powder activated carbon and diatomite is 90-106 μm. The mass ratio of the adsorbent in the inner layer, the coagulant in the coating layer and the flocculant in the outer layer is 60:10:30. The layer-by-layer slow-release water treatment agent for delaying seawater membrane pollution is in the form of spherical particles with a particle diameter of 3mm.

[0102] Thus, the obtained layer-by-layer slow-release water treatment agent is added to seawater, polyaluminum chloride first plays a flocculation function, captures suspended particles, colloids, etc. in seawater to form fine flocs; secondly, polydimethyldiallyl Ammonium chloride plays the role of coagulation aid, making the flocs large and loose; finally, diatomite plays the role of adsorption.

[0103] ...

Embodiment 3

[0105] A layer-by-layer slow-release water treatment agent for delaying seawater membrane fouling, which is composed of an inner layer of adsorbent, a coating layer of coagulant aid and an outer layer of flocculant, and the adsorbent of the inner layer is powdered activated carbon and diatomite, powdered activated carbon and diatomaceous The soil is mixed at a mass ratio of 1:1, the coagulant of the coating layer is a mixture of polyacrylamide and polydimethyldiallyl ammonium chloride at a mass ratio of 1:1, and the outer flocculant is chlorine at a mass ratio of 1:1. Mixture of iron oxide and aluminum chloride. The particle size of powdered activated carbon and diatomaceous earth adsorbent in the inner layer is 100 μm. The mass ratio of the adsorbent in the inner layer, the coagulant aid in the coating layer and the flocculant in the outer layer is 50:13:37. The layer-by-layer slow-release water treatment agent for delaying seawater membrane pollution is in the form of spher...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention provides a layer-by-layer slow release water treatment agent for delaying sea water membrane pollution and a preparation method thereof, and relates to the technical field of slow release water treatment agents. The layer-by-layer slow release water treatment agent for delaying sea water membrane pollution consists of an adsorption agent inner layer, a coagulant aid covering layer and a flocculating agent outer layer, wherein inner layer adsorbing agents are powdery active carbon and diatomite; covering layer coagulant aids are polyacrylamide and poly dimethyl diallyl ammonium chloride; outer layer flocculating agents are iron type and aluminum type flocculating agents. The preparation method of the layer-by-layer slow release water treatment agent for delaying sea water membrane pollution comprises the following steps that the powdery active carbon and the diatomite are put into a pelleting machine to perform circumferential rotation; the diluted coagulant aid solution is added onto the rotating powdery active carbon and diatomite to perform covering; particles are formed; the flocculating agents are added and wrap the outermost layer of the particles; rotating and drying are performed. The flocculation, the coagulation aid, the adsorption and the dynamic membrane are integrated; the layer-by-layer slow release structure is used; cooperative and synergistic action is achieved; the membrane pollution resistance is reduced; the membrane pollution is delayed; the preparation process is simple; the operation is convenient; the application prospects are good.

Description

technical field [0001] The invention relates to the technical field of slow-release water treatment agents, in particular to a layer-by-layer slow-release water treatment agent for delaying seawater membrane fouling and a preparation method thereof. Background technique [0002] Ultrafiltration is a widely used membrane separation technology. The pore size of ultrafiltration is 0.002-0.200μm. As a seawater pretreatment process, ultrafiltration can remove suspended solids, colloids and microorganisms in seawater, with high water production rate and stable effluent quality. However, ultrafiltration membrane components will be clogged, and membrane fouling will lead to a decrease in membrane flux, a reduction in membrane service life, and an increase in the frequency of membrane cleaning, which limits the wide application of ultrafiltration. Dynamic membrane refers to the filter cake layer or membrane with separation performance formed on the surface of the medium base membrane...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/00C02F1/52C02F1/56C02F1/28C02F1/44B01D65/08B01D61/14C02F103/08
Inventor 赵瑾王文华姜天翔王静张雨山
Owner 自然资源部天津海水淡化与综合利用研究所
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap